Men’s jock briefs Men’s jockstrap briefs made from polyester/spandex Machine wash Imported Unleash your style with this wild animal-print men's underwear from the Extreme Amazon collection. Soft and sexy in lightweight animal-print jersey with a subtle ombré pattern, the Extreme Amazon jock briefs combine the cheeky open-back style of a jockstrap with the support of briefs. In a fresh blue design, the Extreme men's jock briefs also feature black stretch rib trim with keyhole detail and contoured seaming. Made from a blend of polyester and spandex.